车辆荷载激振下多跨连续梁桥的减振研究  

The Vibration Reduction Research of Multi-span Beam Bridge Under Moving Vehicular Loads

作　　者：张鹏 钟晓林 李星 叶茂 任珉[3] 

机构地区：[1]广州建设工程质量安全检测中心有限公司,广州510440 [2]广东高校结构安全与健康监测工程技术研究中心,广州510006 [3]广州大学-淡江大学工程结构灾害与控制联合研究中心,广州510006

出　　处：《广州建筑》2015年第5期22-25,共4页GUANGZHOU ARCHITECTURE

基　　金：国家自然科学基金(51178126;51208125);广东省自然科学基金重点项目(S2011030002800);广州市科技计划项目(2013J2200074)

摘　　要：以行车作用下安装弹簧-质量体系的连续梁桥为研究对象,对桥梁进行减振研究。将车辆简化为两自由度体系系统,将弹簧-质量体系与连续梁桥考虑为一个整体,建立车辆与带弹簧-质量体系连续梁桥的耦合力学模型。通过数值算例表明:安装弹簧-质量体系减振装置可以降低连续梁的振动响应,当弹簧-质量体系的频率接近桥梁的第一阶自振频率时,减振效果较好。The paper studies the vibration reduction of coupled vehicle-bridge system with spring-mass under moving vehicular loads. The vehicle is simplified as two degree of freedom system. The bridge and spring-mass are considered as a whole. The coupling mechanical model is established to simulate the vehicle and the spring- mass system of continuous beam bridge. The numerical examples show： the damping device of spring-mass system can reduce the vibration response of continuous beam bridge; when the frequency of the spring-mass system is close to the bridge of the first-order natural frequency, the vibration reduction effect is good.The nearly first frequency of bridge, the better reducing vibration effects.

关 键 词：车辆荷载 连续梁 弹簧-质量体系 桥面不平顺 

分 类 号：U448.215[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]